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#import <Foundation/Foundation.h>

/*
 clang -fobjc-arc -O2 -Wall write-file-by-merging.m -o write-file-by-merging -framework Foundation
 
 echo qq > $HOME/Desktop/qq.txt
 open -e $HOME/Desktop/qq.txt
 
 then:
 

tjw

#import <Foundation/Foundation.h>

/*

clang -Wall -O2 -fobjc-arc NSURLEncodingCase.m -framework Foundation -o NSURLEncodingCase

./NSURLEncodingCase 'https://localhost/test%5b' 'https://localhost/test%5B'
2013-03-18 11:04:42.663 NSURLEncodingCase[80520:707] https://localhost/test%5b is NOT equal https://localhost/test%5B

http://tools.ietf.org/html/rfc3986#section-2.1 says

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{
  "graph" : {
    "title" : "OmniPresence",
    "datasequences" : [
      {
        "title" : "Hours per Crash",
        "datapoints" : [
          {
            "title" : "2013-02-18",
            "value" : 0

tjw

#import <Foundation/Foundation.h>

#include <sys/stat.h>

/*
clang -Wall -O2 -fobjc-arc directory-url-unencoded.m -o directory-url-unencoded -framework Foundation
*/

int main(int argc, char *argv[])
{

tjw

/*

xcrun swiftc -c switch-enum-struct-case.swift

switch-enum-struct-case.swift:30:36: error: '(size: Size)' does not have a member named 'width'
                  println("rectangle with size \(size.width)x\(size.height)")
                                                 ^    ~~~~~

*/
struct Size {

tjw

    convenience public init?(url:NSURL, error:NSErrorPointer) {
        if let data = NSData(contentsOfURL:url, options: NSDataReadingOptions(0), error: error) {
            self.init(data:data)
        } else {
            return nil;
        }
    }

--> all stored properties of a class instance must be initialized before returning nil from an initializer

tjw

public protocol MeasurementUnit {
    // If we have one of this unit, how many millimeters is it?
    class var asMillimeters: Double { get }
}
public class Inch : MeasurementUnit {
    public class var asMillimeters: Double {
	get {
            return 25.4
	}
    }

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public protocol MeasurementUnit {
  // If we have one of this unit, how many millimeters is it?
  class var asMillimeters: Double { get }
}

public class Millimeter : MeasurementUnit {
  public class var asMillimeters: Double {
    get {
      return 1.0

tjw

import Foundation

@objc protocol MeasurementUnit {
  // If we have one of this unit, how many millimeters is it?
  class var asMillimeters: Double { get }
  var value: Double { get }
    
  init(_:Double)
}

tjw

/*

Subclassing a FloatLiteralConvertible conforming class and then using the convertible bit uses the superclass initializer, even when the subclass type is specified explicitly.

% xcrun -sdk macosx swiftc ./subclass-float-literal.swift 
% ./subclass-float-literal
b1 className = B
b1 = B
b2 className = A
assertion failed: Must be subclassed: file ./subclass-float-literal.swift, line 23